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discussed in biography

...the House Un-American Activities Committee that he was a Communist (Dassin had left the party in 1939). Blacklisted, Dassin fled to England, where he made one of his best movies,
Night and the City (1950). A dark film noir, it starred Richard Widmark as an American hustler involved in London’s wrestling racket, Gene Tierney as his singer girlfriend, and Mike Mazurki as...

role of Lom

...greater recognition after appearing as a psychiatrist treating a repressed young amnesiac in the popular film
The Seventh Veil (1945). In the 1950 noir
Night and the City, Lom played a dangerous figure in the high-stakes underground world of professional wrestling.